630809801 has 4 divisors (see below), whose sum is σ = 636934272. Its totient is φ = 624685332.

The previous prime is 630809789. The next prime is 630809807. The reversal of 630809801 is 108908036.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 630809801 - 2⁶ = 630809737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630809807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3062081 + ... + 3062286.

It is an arithmetic number, because the mean of its divisors is an integer number (159233568).

Almost surely, 2^630809801 is an apocalyptic number.

It is an amenable number.

630809801 is a deficient number, since it is larger than the sum of its proper divisors (6124471).

630809801 is a wasteful number, since it uses less digits than its factorization.

630809801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6124470.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 630809801 is about 25115.9272375121. The cubic root of 630809801 is about 857.6290386549.

The spelling of 630809801 in words is "six hundred thirty million, eight hundred nine thousand, eight hundred one".